hi there...i dont know if this will help but i saw that no one has responded to you so i wanted to try and help. The first time i was pregnant i started bleeding about the same time you did i went to the er and they also did not do an ultrasound on me told me my levels were fine and sent me home, and i had a healthy baby girl who is now 4 years old. But on my second pregnancy i just felt like something was wrong and had really light pink discharge so i figured it was nothing since i had actually bleed during my first pregnancy...but they did do an ultrasound and i had had a miscarriage so i think they determine if they should do an ultrasound on your bloodwork so it they did some testing and it was normal i would sit back and relax and enjoy being pregnant...like i said i bleed more with my healthy pregnancy then i did when they told me i had a miscarriage...hope this helps or at least eases your mind a little bit...good luck to you and i hope you have a healthy baby
p.s when i had my miscarriage i never spotted it was full flow from the start.